10 Things You Didn't Know About Bachelor Parties

Sure, The Hangover is hilarious, but what really happens at bachelor parties?

The movie doesn't even begin to tell the whole story — but we do. After chatting with some experts, here's the truth behind the hype...

1. Getting in on the fun. Bachelor-party strippers say it's not the groom-to-be who usually cheats. His married friends are more likely to cross that line.

SOURCE: David Boyer, author of Bachelor Party Confidential

2. Unwelcome guests. The groom-to-be's biggest pet peeve? When his fiancée — or her maid of honor — shows up at the party unexpectedly. If you have an overly concerned MOH, make sure to spend the night of your guy's bachelor party with her so she can't pull anything crazy.

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SOURCE: Stella Inserra, wedding planner

3. Held prisoner? Um, yeah. If the bachelor party has strippers, it's not necessarily because that's what the groom wants. "The groom is actually kind of being held prisoner and just trying to get through it," says David Boyer, author of Bachelor Party Confidential. The groom's friends are more likely the ones who wanted a show.

SOURCE: David Boyer, author of Bachelor Party Confidential

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4. The long-leash theory. The best way to keep your guy from cheating at a bachelor party is to give him the go-ahead for guys' nights year-round. "The more you try to cage that animal, the more he wants to get out," Boyer says.

SOURCE: David Boyer, author of Bachelor Party Confidential

5. Shame on them. Bachelor parties aren't all about naked women — they're also about humiliating the groom-to-be. Case-in-point: At one party, a stripper dressed as a dominatrix tied the bachelor up...then, just as he was looking forward to a private lap dance, she applied makeup to his face.

SOURCE: Tom Nardone, president of Bachelorette.com

6. Make that shame on us. Women are more likely than men to go home with someone they meet at a wild bachelor(ette) party.

SOURCE: Michael Tomes, vice president of VegasVIP.com

7. The truth about lying. Yes, guys often lie (at least by omission) about what really went down at the party — it's part of the night's code of secrecy. The lies usually aren't huge, but they can be. (For instance, one group threw regular bachelor parties even though none of their friends were getting married.)

SOURCE: David Boyer, author of Bachelor Party Confidential

8. Butt out. 75 percent of people think the bride-to-be should have no say in planning her groom's bachelor party.

SOURCE: The Best Man's Handbook

9. Safety in numbers. More and more couples are holding joint bachelor/bachelorette parties. Carmen Electra and Dave Navarro were the first celebrity couple to start the trend back in 2003. (They are now divorced.)

SOURCE: Brettan Bablove, editorial director of Wedding Solutions

10. Don't ask, don't tell. A groom-to-be might answer his fiancée's questions honestly, but he won't volunteer incriminating or embarrassing information. What if you want the full story? "Ask more probing questions," says Tom Nardone, president of Bachelorette.com.